﻿using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace winformDoDragDrop
{
    public partial class SystemInfoBrowser : Form
    {
        private System.Windows.Forms.ListBox listBox1;
        private System.Windows.Forms.TextBox textBox1;

        public SystemInfoBrowser()
        {
            this.SuspendLayout();
            InitForm();

            // Add each property of the SystemInformation class to the list box.
            Type t = typeof(System.Windows.Forms.SystemInformation);
            PropertyInfo[] pi = t.GetProperties();
            for (int i = 0; i < pi.Length; i++)
                listBox1.Items.Add(pi[i].Name);
            textBox1.Text = "The SystemInformation class has " + pi.Length.ToString() + " properties.\r\n";

            // Configure the list item selected handler for the list box to invoke a 
            // method that displays the value of each property.
            listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
            this.ResumeLayout(false);
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Return if no list item is selected.
            if (listBox1.SelectedIndex == -1) return;
            // Get the property name from the list item.
            string propname = listBox1.Text;

            if (propname == "PowerStatus")
            {
                // Cycle and display the values of each property of the PowerStatus property.
                textBox1.Text += "\r\nThe value of the PowerStatus property is:";
                Type t = typeof(System.Windows.Forms.PowerStatus);
                PropertyInfo[] pi = t.GetProperties();
                for (int i = 0; i < pi.Length; i++)
                {
                    object propval = pi[i].GetValue(SystemInformation.PowerStatus, null);
                    textBox1.Text += "\r\n    PowerStatus." + pi[i].Name + " is: " + propval.ToString();
                }
            }
            else
            {
                // Display the value of the selected property of the SystemInformation type.
                Type t = typeof(System.Windows.Forms.SystemInformation);
                PropertyInfo[] pi = t.GetProperties();
                PropertyInfo prop = null;
                for (int i = 0; i < pi.Length; i++)
                    if (pi[i].Name == propname)
                    {
                        prop = pi[i];
                        break;
                    }
                object propval = prop.GetValue(null, null);
                textBox1.Text += "\r\nThe value of the " + propname + " property is: " + propval.ToString();
            }
        }

        private void InitForm()
        {
            // Initialize the form settings
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.textBox1 = new System.Windows.Forms.TextBox();
            this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right)));
            this.listBox1.Location = new System.Drawing.Point(8, 16);
            this.listBox1.Size = new System.Drawing.Size(172, 496);
            this.listBox1.TabIndex = 0;
            this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom)
                | System.Windows.Forms.AnchorStyles.Right)));
            this.textBox1.Location = new System.Drawing.Point(188, 16);
            this.textBox1.Multiline = true;
            this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;
            this.textBox1.Size = new System.Drawing.Size(420, 496);
            this.textBox1.TabIndex = 1;
            this.ClientSize = new System.Drawing.Size(616, 525);
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.listBox1);
            this.Text = "Select a SystemInformation property to get the value of";
        }
    }
}
